915157997556 has 36 divisors (see below), whose sum is σ = 2347140763296. Its totient is φ = 277320604880.

The previous prime is 915157997527. The next prime is 915157997561. The reversal of 915157997556 is 655799751519.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 315135600 + ... + 315138503.

It is an arithmetic number, because the mean of its divisors is an integer number (65198354536).

Almost surely, 2^915157997556 is an apocalyptic number.

It is an amenable number.

915157997556 is an abundant number, since it is smaller than the sum of its proper divisors (1431982765740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

915157997556 is a wasteful number, since it uses less digits than its factorization.

915157997556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630274132 (or 630274119 counting only the distinct ones).

The product of its digits is 133953750, while the sum is 69.

The spelling of 915157997556 in words is "nine hundred fifteen billion, one hundred fifty-seven million, nine hundred ninety-seven thousand, five hundred fifty-six".